Her son was accused of cheating by the police, ________ made it difficult for her to go to sleep.
| A．what | B．as |
| C．which | D．where |
Long term of hard work and lack of sleep finally ______ her health.
| A．destroyed | B．ruined | C．damaged | D．harmed |
—Would you mind giving your advice on how to improve our efficiency?
—If you make _____ most of forty-five minutes classes day after day, there will be _____ switch in grades.
| A．/; / | B．the; a | C．/; a | D．the; / |
China is known __ ____ greatly in terms of its cultural values over the past few years.
| A．to change | B．having changed | C．changing | D．to have changed |
—I did very well in the English exam last week.
—I did ______. I got a full mark.
| A．no better | B．not better | C．no worse | D．even worse |
I need to call my friend David ______ coat I walked off by mistake yesterday.
| A．in whose | B．in that | C．with which | D．with her |